Revert "PIPE: Add pipe support for passing data into and out of terminal commands (#2395)" (#2524)

This reverts commit 92b8b58588.

Accidental merge on my part - the code is in decent shape, but isn't meant to go in for 3.0.

src/NetscriptFunctions/Singularity.ts

@@ -468,7 +468,7 @@ export function NetscriptSingularity(): InternalAPI<ISingularity> {
       helpers.checkSingularityAccess(ctx);
       const filename = helpers.string(ctx, "filename", _filename);
       const server = Player.getCurrentServer();
-      cat([filename], server, ctx.workerScript.scriptRef.terminalStdOut);
+      cat([filename], server);
     },
     connect: (ctx) => (_host?) => {
       helpers.checkSingularityAccess(ctx);